Effects of overhead-spraying of liquid fertilizer on citrus trees and the soil
2005
Ishikawa, K.(Ehime-ken. Fruit Tree Experiment Station, Matsuyama(Japan)) | Nonaka, M.
We studied the effects of the year-round, overhead-spraying of liquid fertilizer on trees of 'Miyauchi Iyo', Citrus iyo, and 'Nichinan No, 1', Citrus unshiu, and their orchard soils. In the 'Miyauchi Iyo' orchard, there was no significant difference in mineral nitrogen content of the soil, leaf nitrogen content, and the yield between the liquid fertilizer treatment (LFT) and the common fertilizer treatment (CFT). In regard to the fruits quality, however, there were significant differences in sugar and citric acid content between LFT and CFT. In the 'Nichinan No. 1' orchard, the mineral nitrogen content of the soil in LFT was lower than in CFT, particularly in the rainy season. Leaf nitrogen content was also low in LFT depending on the year, but there was no significant difference in the yield and fruits quality between both treatments.
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